Solution: Unpolarized light of initial intensity 26.0 W/m 2 is passed through three polarizing filters. Viewed in the direction the light is traveling, the axis of the first polarizing filter is vertical, the axis of the second polarizing filter is at 35.0° clockwise from the vertical, and the axis of the third polarizing filter is at 75.0° clockwise from the vertical. What is the intensity of the light after it has passed through all three polarizing filters?

Problem

Unpolarized light of initial intensity 26.0 W/m 2 is passed through three polarizing filters. Viewed in the direction the light is traveling, the axis of the first polarizing filter is vertical, the axis of the second polarizing filter is at 35.0° clockwise from the vertical, and the axis of the third polarizing filter is at 75.0° clockwise from the vertical. What is the intensity of the light after it has passed through all three polarizing filters?